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Microprobes BSI-1A Biphasic Stimulus Isolator
"The Model BSI-1A Biphasic Stimulus Isolator is totally battery powered utilizing optimum packaging design to provide maximum isolation of stimulus signals. This instrument is truly linear and will convert any waveform from 0 to plus and minus 10 volts into a constant current or constant voltage stimulus. It has a constant current range from ±100 nanoamps to ±10 milliamps with a compliance voltage of up to ± 125 volts and a constant voltage range between 0 and ±125 volts. A four-position front panel range switch allows optimum resolution for selecting precise stimulus amplitudes. A calibrated front panel control knob allows the investigator to apply input signal levels, which can then be attenuated to give continuously adjustable output levels. A separate output jack is provided for monitoring current levels through the electrode so that no connection need be made across the electrode, which could interrupt the stimulus current path."